Provide definitions/explanations for the following terms:
$(1)$ Pseudoplasmodia
$(2)$ Sac fungi

(N/A) $(1)$ Pseudoplasmodia are found in cellular slime moulds. They are formed as an aggregation of individual amoeboid cells when the food supply in the medium is exhausted.
$(2)$ Sac fungi is the common name for members of the class Ascomycetes. They are mostly multicellular (e.g.,Penicillium) or rarely unicellular (e.g.,yeast).